Hey guys i searched for some info but wasnt really sure what to look for...
Just bought a JDM thermostat that opens at 75 degrees... has anyone used one of these before? results? pleased with it? anything i should know be4 i put it in?
thanks

 

Dunno how much that will give you - stock Mazda thermostat opens at 80 degrees C.

I would only install it if I had a water temp gauge, though - you don't want to start modifying the cooling system without one!

That said, I don't see any reason why it would hurt.

Dale

 

all it is gonna do is start circulating the water sooner right? so... it may run a tiny bit cooler at speed. don't see it doing anything while sitting or city driving because you're fans (unless you have otherwise modded them) won't turn on any sooner. now, if you have fan mods done AND you put in a lower temp thermostat you should see slightly lower water temps.

i agree with him though, get something that can accurately give you water temps before you start screwing with the system just so you don't accidentally block something and not see the temps going up until they are already too high.

 

I heard from a very reliable tuner that several guys who seriously campaign Gen 3s run the Miata thermostat, which opens at 165F versus 185F for the stock FD stat. Any truth to that statement? I guess I fail to see the benefit of having a stat that opens sooner. I mean, if the 185F stat is fully open at that temperature, what would the cooler thermostat buy you on hot ambient days over 90F unless the opening for the thermostat itself were larger and could flow more water.

Comments anyone??

 

75c is just a little to cold for me, the stock one works just fine...I would just do a mod on the fans with the miata thermoswitch, our cars does not run that good at such cold temps.IMO

 

I ran the FD without one for 6 months until I had to get it smogged.

The engine felt as if it had more TQ across the board.

Kinda like that early morning just warmed up engine feeling.

No water boiling sound when I turned off the engine.

I don't know what the temps were since at the time I didn't have any gauges (I've got a PFC commander now).

 

If your engine temps stay too low, the stock ecu will think the engine is not warmed up. This can result in an overly rich fuel mixture. I find that my car runs much better once the coolant temps get over 190 degrees. If you are not road racing, stay with the stock thermostat.